TW200708880A - Focusing method for image-grabbing device - Google Patents
Focusing method for image-grabbing deviceInfo
- Publication number
- TW200708880A TW200708880A TW094127810A TW94127810A TW200708880A TW 200708880 A TW200708880 A TW 200708880A TW 094127810 A TW094127810 A TW 094127810A TW 94127810 A TW94127810 A TW 94127810A TW 200708880 A TW200708880 A TW 200708880A
- Authority
- TW
- Taiwan
- Prior art keywords
- image
- grabbing device
- focusing method
- focus
- focus lens
- Prior art date
Links
Landscapes
- Studio Devices (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
A focusing method for an image-grabbing device is disclosed. The focusing method first determines a maximal contrast value and a corresponding first position of a focus lens by a focus procedure. Next, the focus lens is set to shoot a focus picture corresponding to each of a plurality of different positions, and a second position of the focus lens is then selected from these positions according to file sizes of a plurality of peripheral regions of each focus picture. Last, the focusing method compares the first and second positions to generate an adjusting step, and then adjusts the position of the focus lens according to the adjusting step. By applying this method, the unbalanced resolution of the image-grabbing device can be improved, thereby upgrading the overall resolution and performance of the image-grabbing device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94127810A TWI292851B (en) | 2005-08-16 | 2005-08-16 | Focusing method for image-grabbing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94127810A TWI292851B (en) | 2005-08-16 | 2005-08-16 | Focusing method for image-grabbing device |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200708880A true TW200708880A (en) | 2007-03-01 |
TWI292851B TWI292851B (en) | 2008-01-21 |
Family
ID=45067652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW94127810A TWI292851B (en) | 2005-08-16 | 2005-08-16 | Focusing method for image-grabbing device |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI292851B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI465170B (en) * | 2008-01-03 | 2014-12-11 | ||
CN114236747A (en) * | 2021-07-13 | 2022-03-25 | 广东弘景光电科技股份有限公司 | Method for adjusting optimal resolution position of lens |
-
2005
- 2005-08-16 TW TW94127810A patent/TWI292851B/en not_active IP Right Cessation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI465170B (en) * | 2008-01-03 | 2014-12-11 | ||
CN114236747A (en) * | 2021-07-13 | 2022-03-25 | 广东弘景光电科技股份有限公司 | Method for adjusting optimal resolution position of lens |
CN114236747B (en) * | 2021-07-13 | 2024-04-05 | 广东弘景光电科技股份有限公司 | Adjusting method for optimal resolution position of lens |
Also Published As
Publication number | Publication date |
---|---|
TWI292851B (en) | 2008-01-21 |
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Legal Events
Date | Code | Title | Description |
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MM4A | Annulment or lapse of patent due to non-payment of fees |